Signature Of Incomplete Fusion Reaction In Ne-20+Tb-159 System: Entrance Channel Parameters Effect

More complex and interesting phenomenon of incomplete fusion (ICF) reactions induced by Ne-20 on Th-159 have been measured at several beam energies range of 4.3 - 8.2 MeV/A by using catcher foil technique followed by the gamma-ray spectrometry. The cumulative cross-sections of evaporation residues produced in above reaction have been measured and deduced independent cross-sections have been compared with statistical model based computer code PACE-2. The complete fusion (CF) channels pxn agrees well with PACE-2 predictions after the subtraction of precursor contribution. The alpha emission products show higher cross-section than that predicted by the complete fusion product, which is attributed to the presence of incomplete fusion of projectile with target at lower energies. This enhancement in the measured cross-section is attributed to the fact that these residues are formed not only by complete fusion but also through the ICF of Ne-20 into alpha clusters, i.e., Ne-20 into O-16+alpha and/or C-12+2 alpha etc. For the better understanding of ICF, the incomplete fusion fraction has also been deduced and its sensitivity with various channel parameters like projectile energy, entrance channel mass-asymmetry, alpha-Q value, Coulomb effect (Z(P)Z(T)), deformation parameter (beta(2)) have been observed.